- let d = matchRange('0','9'); // \d
- // [+-]
- let plusMinus = orDo(match1Char('+'), match1Char('-'));
- let s_aux = orDo(match1Char(' '), match1Char('\t')); // (" " | "\t")
-
- // integer = ([+]|[-])?\d\d*
- let integer = bTerm((x : Maybe<MatcheePair>)=>
- thenDo(thenDo(thenDo(x,
- zeroOrOnceDo(plusMinus)),d),
- zeroOrMoreDo(d)),
- TokenType.INT);
- // space = [ \t]+
- let space = bTerm((x : Maybe<MatcheePair>)=>
- thenDo(thenDo(x, s_aux), zeroOrMoreDo(s_aux)),
- TokenType.INT);
-
- // newline = \r?\n
- let newline = bTerm((x : Maybe<MatcheePair>)=>
- thenDo(thenDo(x,
- zeroOrOnceDo(match1Char('\r'))),
- match1Char('\n')),
- TokenType.NL);
-
- // [_A-Za-z]
- let idHead = orDo(orDo(matchRange('a','z'),matchRange('A','Z')), match1Char('_'));
- let idRemained = orDo(idHead, matchRange('0','9')); // [_A-Za-z0-9]
-
- // id = [_A-Za-z][_A-Za-z0-9]*
- let id = bTerm((x : Maybe<MatcheePair>)=>
- thenDo(thenDo(x,
- idHead),
- zeroOrMoreDo(idRemained)),
- TokenType.ID);
- let doublequote = match1Char("\"");
- // [\\][\"]
- let escapeReverseSlash = (x:MatcheePair)=>
- thenDo(thenDo(toSome(x), match1Char("\\")), doublequote);
- // ([\\]["]|[^\"])*
- let stringInnerPattern = zeroOrMoreDo(
- orDo(escapeReverseSlash, notDo(match1Char("\""))));
-
- // str = ["]([\\]["]|[^"])*["]
- let str = bTerm((x : Maybe<MatcheePair>)=>
- thenDo(thenDo(thenDo(x,doublequote),
- stringInnerPattern),doublequote),
- TokenType.STR);
-
- // float = [+-]?\d+[.]\d+
- function floatPattern(x : Maybe<MatcheePair>){
- return thenDo(thenDo(thenDo(thenDo(thenDo(thenDo(x,
- zeroOrOnceDo(plusMinus)),d),
- zeroOrMoreDo(d)),
- match1Char(".")),d),
- zeroOrMoreDo(d))};
- let float = bTerm(floatPattern, TokenType.FLO);
-
- // operators
- // +.
- let floatAdd = bTerm((x : Maybe<MatcheePair>)=>
- thenDo(thenDo(x, match1Char("+")),match1Char(".")),
- TokenType.F_ADD);
- // +.
- let floatSub = bTerm((x : Maybe<MatcheePair>)=>
- thenDo(thenDo(x, match1Char("-")),match1Char(".")),
- TokenType.F_SUB);
-
- // *.
- let floatMul = bTerm((x : Maybe<MatcheePair>)=>
- thenDo(thenDo(x, match1Char("*")),match1Char(".")),
- TokenType.F_MUL);
-
- // /.
- let floatDiv = bTerm((x : Maybe<MatcheePair>)=>
- thenDo(thenDo(x, match1Char("/")),match1Char(".")),
- TokenType.F_DIV);
-
- // ==
- let eq = bTerm((x : Maybe<MatcheePair>)=>
- thenDo(thenDo(x, match1Char("=")),match1Char("=")),
- TokenType.EQ);
-
- // >=
- let ge = bTerm((x : Maybe<MatcheePair>)=>
- thenDo(thenDo(x, match1Char(">")),match1Char("=")),
- TokenType.GE);
-
- // <=
- let le = bTerm((x : Maybe<MatcheePair>)=>
- thenDo(thenDo(x, match1Char("<")),match1Char("=")),
- TokenType.LE);
-
- // ->
- let rightArrow = bTerm((x : Maybe<MatcheePair>)=>
- thenDo(thenDo(x, match1Char("-")),match1Char(">")),
- TokenType.R_ARROW);
-
- /**
- * unary operator : generating the pattern of basic unary operator
- * @param char : uniry char for the operator
- * @param token_type : the corresponding token_type
- */
- function unaryOp(char: string, token_type: TokenType) {
- return bTerm((x : Maybe<MatcheePair>)=>thenDo(x, match1Char(char)),
- token_type);};
-
- let intAdd = unaryOp('+', TokenType.I_ADD);
- let intSub = unaryOp('-', TokenType.I_SUB);
- let intMul = unaryOp('*', TokenType.I_MUL);
- let intDiv = unaryOp('/', TokenType.I_DIV);
- let lParen = unaryOp('(', TokenType.L_PAREN);
- let rParen = unaryOp(')', TokenType.R_PAREN);
- let lBracket = unaryOp('[', TokenType.L_BRACK);
- let rBracket = unaryOp(']', TokenType.R_BRACK);
- let lBrace = unaryOp('{', TokenType.L_BRACE);
- let rBrace = unaryOp('}', TokenType.R_BRACE);
- let comma = unaryOp(',', TokenType.COMMA);
- let dot = unaryOp('.', TokenType.DOT);
- let colon = unaryOp(':', TokenType.COLON);
- let semicolon = unaryOp(';', TokenType.SEMI_C);
- let at = unaryOp('@', TokenType.AT);
- let hash = unaryOp('#', TokenType.HASH);
- let set = unaryOp('=', TokenType.SET);
- let greaterthan = unaryOp('>', TokenType.GT);
- let lessthan = unaryOp('<', TokenType.LE);
-
-
- let term = (token_list : Array<Token>, x : Some<MatcheePair>)=>{
- var ln = 1;
- var col = 0;
- var old_x = x;
- let term_list = [float, newline, space, integer,str, id,
- floatAdd, floatSub, floatMul, floatDiv,
- intAdd, intSub, intMul, intDiv,
- eq, ge, le, rightArrow,
- lParen, rParen, lBracket, rBracket, lBrace, rBrace,
- comma, dot, colon, semicolon, at, hash,
- set,greaterthan, lessthan];
- let term_aux = term_list.reduce((x,y)=> orDo(x,y));
-
- var new_x : Maybe<MatcheePair> = thenDo(old_x, term_aux);
- while (new_x._tag != "None"){
- if (new_x.value.matched_type != TokenType.NL){
- col += new_x.value.matched.length;
- token_list.push({text : new_x.value.matched,
- type: new_x.value.matched_type,
- ln : ln,
- col : col});
-
- }
- else{
- col = 0;
- ln += 1;
-
- token_list.push({text : new_x.value.matched,
- type: new_x.value.matched_type,
- ln : ln,
- col : col});
-
- }